Pulley-block



(No Model.)

J.4 O. MGNAMARA.

PULLEY BLOCK.

No. 146,461= Patented Feb. 17,1891.

ivrrnn darne nent rieten,

JOI-IN O. MCNAMARA, OF TROY, NEV YORK.

PULLEY'f-BLOCK.

SPECIFICATION forming part of Letters Patent No. 446,461, dated February 1'7, 1891.

Application tiled October 8, 1890. Serial No. 367,431. (No model.)

T0 a/ZZ whom, t may concern:

Be it known that I, JOHN C. MCNAMARA., a citizen of the United States, residing at'lroy, county of Rensselaer, and State of New York, have invented certainnew and useful Improvements in Pulley-Blocks, of which the following is a specification.

My invention relates to such ixnprovements; and it consists of the novel construetion and combination of parts hereinafter described and subsequently claimed.

Reference may be had to the accompanying drawings, and to the letters of reference marked thereon, which forni a part of this specification.

Similar letters refer to similar parts in the several .figures therein.

Figure 1 is a side elevation of inyilnprovcd pulley-block and a portion of cord supported thereby, one of the case-walls being partly broken away. Fig. 2 is a cross-section of the saine taken on the broken line 2 2 in Fig. l. Fig. 3 is a plan view ot' the guard-plate detached.

A is the pulleycase provided with a supporting-eye A and centrally perforated to re ceive the aXle A2 of the pulley A3, peripherally grooved to receive the cord A4.

It is well known that when a pulley is ein-` ployed to support a carrying clothes line or cord for operatinga folding awning made of fabric the clothes or fabric frequently get between the wheel and line and are carried into or through the pulleycase, where they are soiled or torn, and it not infrequently happens that the fabric becomes so wedged into the case as to niake it very inconvenient to remove it without material injury to the fabric. I therefore provide a guard consisting of a plate B, having a perforation I3 adapted to receive a oord A4. The plate extends transversely of the pulleyegroove and is supported in grooves B2 oppositely located in the inner sides of the case-walls and together forming a retaining channel or slideway for the plate. Such plate being free to nieve in the slideway readily adjusts itself to the position of the pulley-cord and serves to prevent the cord or line supported fabric from entering the pulley-case to be injured thereby or wedged therein.

I ain aware that pulley-blocks have heretofore been provided with guard-plates supported across the face of the pulley by straps located exteriorly of the case, and I do not claiin such construction.

By supporting the guard-plate in grooves in the inner sides of the case-walls I ani able to dispense with exterior straps, leaving the outer surface of the block smooth while the movable parts are protected interiorly of the case.

lVhat I claiin as new, and desire to secure by Letters Patent, is-

The combination,with a pulley and a guardplate perforated to receive the pulley-cord, of a pulley-case having plate-su pportin g grooves on theinner sides of the case-walls, whereby the guard-plate is inovably supported across the periphery of the pulley in such grooves, substantially as described.

In testimony whereof I have hereunto set in y hand this 4th day of October, 1890.`

JOHN C. MCNAMARA.

Witnesses:

FRANK C. CURTIS, CHAs. L. ALDEN. 

